<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        function fn2(){
            console.log("fn2");
        }


        function fn1(){
            console.log("fn1");
            fn2();
        }



        function fn(){
            console.log("fn");
            fn1();
        }

        fn();



        // 1.今天知识点 2. 这个星期所有知识点 3.循环作业 4.函数作业  5.预习 ；
    </script>
</body>
</html>